Nature of the band gap of halide perovskites ABX3 ( A = CH3NH3, Cs; B = Sn, Pb; X = Cl, Br, I): First-principles calculations<xref ref-type="fn" rid="cpb150734fn1">*</xref>

Nature of the band gap of halide perovskites ABX₃ ( A = CH₃NH₃, Cs; B = Sn, Pb; X = Cl, Br, I): First-principles calculations*

Yuan Ye^a), Xu Run^a), Xu Hai-Tao^a), Hong Feng^b), Xu Fei^b), Wang Lin-Jun^a)

The total DOS of (a) CsPbCl₃, (b) CsSnCl₃, (c) CsSnBr₃, and (d) CsSnI₃ calculated by using the HSE method without SOC. The zero position of the horizontal ordinate means the position of vacuum energy.